Rotary crusher



hezi i J. L. SCHULTZ ROTARY CRUSHER Filed Dec.r

VMarch 24, 1931.-

Patented Mar. 24, 193i JOHN L. SCHULTZ, 0F PHILADELPHIA, PENNSYLVANIA,ASSIGNOR T0 EXCAN EN- 7 GINEEEING COMPANY, 0F PHILADELPHIA,PENNSYLVANXA, A COORATION 0F PENNSYLVANIA ROTARY CBUSHEE .applicationledDecember 8, 1926. Serial No. 153,315.

My invention relates to Crushers, having particular relation to rotaryCrushers applicable, for example,I t furnace installations.

One object of my invention is to provide a Crusher construction whereina tooth is provided with a removable wearing head part, so that thedamaged working portion of the tooth may be easily and quickly removedWithout disturbing the remaining portion of the tooth and associatedCrusher parts.

Another object of my invention is to provide a two-part tooth, of whichone part is provided with a wedge portion and the other a co-actingrecessed portion, together with a pin `for removably securing saidportions in interlocked relation.

A further object of my invention is to provide a tooth constructionwherein a working part is riveted to a root part.

With these and other objects and applicationsin mind, my inventionfurther consist-s in the details of construction and arrangement,hereinafter set forth and claimed and illustrated in the accompanyingdrawings, wherein- Y Fig. 1 is a top plan view of a Crusher rollembodying my invention;

Fig. 2 is a transverse sectional view on the line 2-2 Fig. 1;

Fig. 3 is a slightly enlarged top plan view of 1one of the teeth apartfrom the Crusher rol Y Fig. 4 is an end elevational view of thestructure of Fig. 3, looking from the right; and

Fig. 5 is a view similar to Fig. 3 but showin a modification.

eferring to the drawing, a Crusher roll 1 comprises at least a pair ofsections 2 and 3, the number of sections dependin upon the desiredlength of the Crusher. Fig. 2 shows in detail the structure of each ofthe sections 2, 3, the sectional plane, however, being on the line 2-2passing through the Crusher roll section 2. This section will bedescribed in detail only, inasmuch as the section 2 is substantiallyidentical therewith.

The section 2 comprises an inner elongated shell 4 having one or moreinwardly extending ribs 5 formed lto abut against the flat sides 6 of arectangular portion 7 of a shaft 8 running lengthwise of the Crusherroll 1. The shell 4 may comprise at least two sections 9 and 11 forconvenience in assembling on the shaft 8. rl`he shell 4 is also providedwith a plurality of axially elongated flat sides 12 which serve tosupport one or more teeth l3. rlhe teeth 13 may be secured in positionby means of an outer cylindrical clampin lshell 14 provided with one ormore inwardgly extending supporting ribs 15 adapted to engage theseveral outer sides 12 of the inner shell 4. The outer shell 14preferably comprises sections 16 and 17 which are releasably clampedtogether on opposite sides by pairs of bolts 18 and 19, respectively.and 19 also extend through opposite et recesses 21 and22 in the innershell 4, whereby relative longitudinal movement between the shells 4 and14 may be substantially prevented and the whole securely locked inposition.

According to my invention, each of the 'lhe pairs of bolts i teeth 13,of which Fig. 2 illustrates one in vertical cross section, comprises aroot part 23 and a removable wearing head part 24, the two parts beingmechanically interlocked, so that in the event of the damaging of thehead 24, it may be readily removed without disturbing t e root part 23and associated sections 16 and 17 of the outer shell 13, all as willpresently appear in greater detail. The root part 23 is provided withanenlarged base portion 25 whlch abuts against. shoulders 26 formed in asocket or coring 27 in the outer shell 14, whereby a movement of theroot part 23 outwardly of the shell 14 may be prevented.

rlhe root part 23 is provided with a head portion 28 which extendsoutwardly of' the socket 27 beyond a working or outer surface 29 of theshell section 14. rl`he head portion 28 is provided with a leadingortion 31 of wedge shape having angled si es 32 and v33 terminating in asubstantially vertical front end wal134. The angled sides 32 and 33 formsubstantially horizontal shoulders 35 and 36 which are preferablypositioned below the outer working surface 29 of the shell 14 forreasons as will presently appear.

The removable working part or cap 24 of each of the teeth 13 is providedwith a recess 37 of triangular form on an underside 38 thereof. Therecess 37 extends from a rear or lagging end portion 39 -forwardly inthe direction of a leadin end portion 41. The recess 37 comprises sustantially parallel side wall portions 42 and 43 which are respectivelypositioned adjacent to flat side wall portions 44 and 45 of a laggingportion 46 of the root head portion 28. The recess 37 also includesangled side wall portions 47 and 48 extending inwardly toward theleading end portion 41 and terminating in an end wall 49, as in the caseof the corresponding walls 32, 33 and 34 of the wedge portion 31 of theroot part 23.

A to wall 50 of the recess 37 is extended rearwardly to providean endportion 52 which overhangs a rear side wall 53 of the lagging portion 46of the root head portion 28.

The underside 38 of the side walls 47, 48 and the leading end portion 41of the tooth part 24 is formed complementarily to the ad- ]acentlworkingsurface 29 of the Crusher roll 1 and it may be secured in engagementtherewith by means of a wedge portion 54 extending rearwardly from thewall 49 into a recess 55 formed in the adjacent end wall 34 of the roothead portion 28. The wedge portion 54 may comprise a downwardly inclinedwall 56, which is spaced from the upper wall 50 of the recess 37 by awall section 57, and an upwardly inclined wall 58 extending from theunder side 38 of the end portion 41,

the walls 56 and 58 having a meeting edge 59.

The shoulder formed by the wall 56 in co-operation with the adjacentside of the recess 55 tends to prevent 4a radially outward movement ofthe wearing art 24 during periods of operation. Similar y, the shoulderformed by the wall 50 in connection with the adja cent side of therecess 55, 'causes a clamping engagement to obtain between the underside38 of the working part 24 and the working surface 29 of the roll 1. Theseated or interlocking relation of the wedge portion '54 and the recess55 may be effected by moving the head part 24 vci-rcularly in aclockwise direction over the outer surfaces 29 of the roll 1.

My invention further contemplates means, whereby the seated relationbetween the wedge portion 54 and the recess 55, as well as the underside 38 and the adjacent roll surface 29 may be maintained until it isdesirable to remove the head part 24. To this end, I extend the sidewall portions 42 and 43 rearwardly of the lagging side 53 of the roothead portion 28, and provide these extensions with aligned taperedapertures 62 and 63 for the removable reception of a tapered pin 64. Anadjacent portion of the rear side wall 53 is also provided with atapered recess 65 which engages substantially one-half only of thecircumference of the removable wedging pin 64. Thus, not only is thelagging end portion of the wearing part 24 locked against the clampingof the underside 53 of the rei movable head part 24 against the outerpart 29 of the roll 1.

In the event of the damaging of the tooth 13, the pin 64 is forcedtransversely thereof out of wedging engagement with the side wallapertures 62 and 63 and the semi-circular recess 65, permitting acounterclockwise circular movement of the removable tooth part 24 overthe surface 29 of the roll l and the consequent removal of the wedgeportion 54 from the recess 55. The tooth part 24 may now be liftedvertically from the roll l and replaced by a new wearing tooth partwhich is clamped in position by moving the wedge portion 54 thereof intoengagement with the recess 55 of the original tooth part and clampingthe whole together by the same wedging pin 64.

An alternative method of securin the head part 24 in position is shownin ig. 5, wherein side wall extensions 42 and 43 of a head part 24 areprovided with oppositely fiared aligned apertures 62 and 63 for thereception of a rivet 64. An adjacent portion of a rear side wall 53 ofthe root part 23 is provided with a semi-circular recess 65 havingtapered end portions 66 and 67 respectively adjacent to the apertures 62and 63. When the tooth parts 23 and 24 are to be secured together, therivet 64 is positioned in the recess 65 ywith its ends extending throughthe side wall apertures 62 and 63. The rivet 64 is then upset so that itassumes the form in Fig. 5 and rigidly locks the tooth parts 23 and 24together. In the event of the damaging of the head part 24', it isbroken so that it may be removed and a new head part riveted inposition.

While I have shown only two embodiments of my invention, for the purposeof describing the same and illustrating their principles of constructionand operation, it is apparent that various changes and modifications maybe made therein without de arting from the spirit of my invention, and)I desire, therefore, that only such limitations shall be imposed thereonas are indicated in thepappended claims or as'are demanded by the priorart.

I claim:

1. A two-part tooth, of which one part is provided with a recess and theother a portion extending into said recess, one of said parts having awedge portion and the othery recessed portions being positioned in saidfirst-mentioned recess, and a movable wedging element positioned in atleast one of said recesses so as to secure said portions in seatedrelation.

2. A Crusher roll having a socket, a tooth having a body part adapted tobe positioned in said socket, and a removable head part, said partshaving portions movable into seated relation upon a substantiallycircular movement of one of said parts, and means whereby a reversecircular movement may be prevented other than when said last-mentionedpart is to be removed from the other part.

3. A Crusher roll having a two-part tooth, said parts havinginterlocking portions movable into seated relation upon a substantiallycircular movement ofone part about said roll, said interlocking portionspreventing a radial movement between the two parts of said tooth, andmeans including a rivet for preventing a relative circular movement ofsaid parts tending to unseat said interlocking portions.

4. A Crusher roll having a two-part tooth, of which a leading portion ofone part is provided With a recess and the other part a coactinshoulder, said shoulder being movable into lnterlocking relation withsaid recess upon a circular movement of one of said parts about theperiphery of said roll, and

means in abutting relation to a lagging portion of one of said partsserving to prevent a' reverse circular movement of said lastmentionedpart, whereby said shoulder and said recess may be removably locked inposition.

v 5. A tooth comprising a root part and a removable head part, one ofsaid parts having a recessed portion adapted to receive a portion of theother part,one of said portions having a wedge and the other a co-actingrecess, whereby relative radial movement between said parts may beprevented, and a locking element extending across said recessed portionand positioned in abutting relation to an adjacent portion of the otherpart. v

6. A Crusher having a two-part tooth, of

which one part is mounted in said roll and Y provided with a sectionextending beyond the periphery thereof, the other part of said toothbeing formed to constitute a cap for said extended section, leadingportions` of said parts being so formed asl to establish an interlockedrelation therebetween, and means in interlocked relation to laggingportions of said tooth parts for securing said cap part in position.

7. A Crusher tooth comprising a base part and a removable wearing partconstituting a cap therefor,'leading portions of said cap and base artsbeing in interlocked relation, and a We ging pin carried by a laggingportion of said cap positioned in abutting relation to a lagging portionof the other tooth part.

8. A two-part tooth comprising a root part and a removable head parthaving a recess adapted to receive one end of said root part, saidrecess having side and end Walls, said end 'wall being provided with awedge and the adjacent portion of said root part having a complementaryrecess, and means extending between said side walls for removablysecuring said wedge in seated relation to said complementary recess.

9. A two-part crusher tooth, one part of which is provided with a recesshaving side end and top Walls, said side walls being inclined inwardlytowards said end wall, the latter having a wedge portion extending4toward the lagging end of said tooth.

10.' A rotary Crusher having a two-part tooth, a root part of which ismounted in said rotary Crusher and provided with a portion extendedbeyond the periphery thereof, the other part constituting a removablecap for said extended portion and provided with a recess extendingtoward the leading end thereof and terminating in an oppositelyextending shoulder portion, and removable locking means extendingthrough said recess in operative relation to a lagging portion of saidroot part, whereby said second-mentioned part may be removably securedin position.

11. A roll, a two-part tooth therefor, a base part of said tooth beingseated in said roll, a wearing part being removably mounted on an outerend of said base part, said Wearing part having a recess of wedge shapeextending toward the leading end of the tooth and terminating in van opositely extending wedge portion, and a'we ging element operativelyassociating said parts.

12. A two-part tooth comprising a base part having a head portion formedto constitute a wed e, the other part having a complementari y recessedportion for saidwedge portion, one of said parts having a wedge portionand the other a complementary recessed portion, and a locking pinremovably carried by at least one of said parts positioned in abuttingrelation to the other.

13. A crusher roll having a two-part tooth, one part being positionedwithin said roll and having a ead portion extending therebeyond, saidportion being of wedge shape and having a recess on a lagging portionthereof, the other part of' said tooth being formed to constitute a capfor said wedge portion and movable into operative relation upon acircular movement about the priphery of said roll, said tooth partshaving portions movable into interlocking relation upon said circularmovement serving to prevent a radial movement of said cap part, andmeans removably mounted on said cap part and positioned in said laggingrecess portion wherev meaooo by a reverse circular inovement may beprevented.

14. A Wearing tooth part provided with a recess extending toward theleading end thereof and terminating in an oppositely 'extending Wedgeportion defining at least two locking shoulders, and a pm extendinthrough said recess and supportedaby sai tooth part.

l5. n a Crusher, a two-part tooth', of which one part is provided with awedge portion and the other part a co-acting recess portion, and meansfor removably locking said ortions in position comprising a pin extening from one of said parts, the other of said parts having a recess forengagin substantially one-half the circumference o said pin.

16. A. Crusher roll having a tooth, one part of which is positionedWithin said'roll and provided with a head portion extending therebeyond.a leading portion of said head portion having a recess forming a lockingshoulder, and a locking pin, a lagging portion of said head portionhaving a recess in cooperative relation to said pin and of a depthsubstantially -equal to the radius of said pin.

17. A two-part tooth, of which one part is provided with a recess andthe other a portion extending into said recess, one of said parts havinga Wedge portion and the other a co-acting recess portion, said Wedge andrecess portions being positioned in said firstn mentioned recess, andmeans for securing said Wedge and recess portions in seated relation.

JOHN L. SCHULTZ.

